Work and material holder for stamping-machines



W. E. CHOATE. WORK AND MATERIAL HOLDER FOR STAMPING MACHINES.

APPLICATION mw FEB. s, 1920.

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1,3 95,555 Patnted Nov. 1, 1921.

65 Z SHEETS-SHEET 2.

6/ a 1 O: A I I UNITED STATES PATENT OFFICE.

WILLIAM E. CHOATE, OF HAMILTON, MASSACHUSETTS ASSIGNOR, BY MESNE ASSIGN- MENTS, TO FEDERAL FINANCE CORPORATION, A CORPORATION OF MASSACHU- SETTS.

wonx'snn MATERIAL HOLDER non STAMPING-MACHINES.

Specification of Letters Patent.

Patented Nov. 1, 1921.

To all whom it may concern:

Be it known that I, WILLIAM E. CHoA'rn, a citizen of the United States, and resident of Hamilton, county of Essex, and State of Massachusetts, have invented an Improvement in Work and Material Holders for Stamping-Machines, of which the following description, in connection with theaccompanying drawings, is a specification, like characters on the drawings representing like parts. 7

This invention relates to stamping machines such as are used for producing inscriptions or designs of metallic leaf or the like. The invention has more particularly to do with that part of such a machine which is adapted to support the article which is to be marked and the transfer medium, such, for instance, as gold leaf, which is to be applied thereto.

My invention will be best understood by reference to the following description of an illustrative embodiment thereof shown by way of example in the accompanying drawings, wherein:

Figure 1 is a side elevation of a machine having my improvements applied thereto;

Fig. 2 is a'rear elevation of the holder for the work and marking medium, the view being from the right hand side in Fig. 1;

Fig. 3 is a plan view thereof;

Fig. d is a partly broken section on the line 1& of Fig. 2;

Fig. 5 is a similar view showing the parts in a different position of adjustmentgand Fig. 6 is an enlarged-section on line 66 of Fig. 3 but with certain features exaggerated.

Referring to Fig. 1 ofthe drawings, I have there shown a machine of the general type shown in my Patent No. 1,128,225, Feb. 9, 1915, and in my co-pending application Serial No. 115,112, filed Aug. 15, 1916, and embodying a transversely movable printing head 7 movingon ways 9 of the upright 11 and carrying at its lower end a rotary member 13 adapted to support around its periphery a series. of types or dies which may be'suitably heated, prefer ably. by electrical means as indicated herein by the wiring 15. Rotary. adjustment of the element 13 will bring a selected type under plunger 17 which may then be depressed by means of the handle 19 to thrust the type or die against the work. The transverse move-- ment of the head 7 spaces between letters in well known manner.

It will be understood that the mechanism just described is adapted to make stampings with gold leaf or similar transfer media. This operation is usually carried on as follows. The article is placed beneath the die and the metallic leaf, which maybe mounted on a suitable backing or carrier, placed thereover. A suitable adhesive is either applied to the face of the work or incorporated with the leaf. In the latter case the marking material is sometimes known as sized leaf. The heated die is then pressed against the material, develops the latent adhesive properties of the adhesive and causes the metallic leaf to be transferred to the article to be marked at those places where the die comes in contact therewith.

The present invention more particularly relates to means for supporting the article to be marked for operation of the types or dies thereon and for supporting in proper position over the article to be marked the marking medium, which in the example shown is mounted leaf in ribbon form, that is, metallic leaf mounted on a backing strip of )aper. v

The apparatus herein shown comprises a suitable support or frame which may have a base 21 from which arise uprights 23 supporting at their upper end, as best shown in Fig. 4, a transverse web 25 which provides an anvil or platen for sustaining the work beneath the marking dies. An angular member 27 may be secured to the front side of this platen'providing an additional shelf-like support for the work and facilitating the holding of it in proper position on the platen proper 25. As an example of the work for which the present apparatus is adapted there may be mentioned the sweat bands of hats which would be folded outwardly and slid over the platen 25.

To position the work on the platen and securely hold it during the marking operation a suitable pressure plate or clamp is provided which may consist of an angular plate having a base 29 and an upstanding flange 31, the base being provided with the elongated slot 33 (see Fig. 3) through which the types may work to mark the article and with the inspection slots 35, the purpose of which will hereinafter more clearly appear. The pressure plate 29 is preferably yieldingly pressed toward the platen 25 and I have herein shown it as carried by two offset arms 37, the main bodyportions of which, as best shown in Fig. l, are displaced rearwardly so as not to obstruct the space beneath the platen in such a way as would make it diiiicult to introduce certain articles thereover. These arms 37 may conveniently be guided for rectilinear movement on the supports 23 and for this purpose they are here shown provided with slots receiving reduced ends on the cross shaft 39 and these slots may also receive reduced ends on the plugs 41 screwed into the sides of uprights 23, there being thus provided a two point contact for the arms which constrains them to move vertically and rectilinearly. The arms 37 may be provided with offset .ends 43 in which slide the rods 45 secured to the caps 47 carried by the cross shaft 39. Suitable springs 49 surround these rods and are interposed between the caps 17 and the offset ends 43 and as will be clearly understood these springs normally thrust the arms downwardly and resiliently press the plate 29 down against the anvil 25. For lifting the pressure plate against the force of the springs the arms may be connected by a cross bar 51 with which cooperates a cam lever 53 journaled on the cross shaft 39. Movement of the cam from the position shown in Figs. 1 to 3 to the position shown in Fig. 4 lifts the cross bar and raises the clamping plate 29 away from the platen'25 to the elevated position'clearly shown in Fig. 4.

The clamping plate 29 may also serve as a support for a roll 55 of gold leaf, standards 57 being provided at one end thereof, adapted to receive the journal pin 59 which is held in place therein by the spring clip 61- cooperating with a reduced portion of this journal pin. From the roll 55 the strip of leaf may be led over a guide roller and through a suitableslot 63 in plate 29 and then longitudinally of the plate underneath the openings 33 and 35. At the opposite end the plate may be provided with the tearing edge 65 so that after use a length of used leaf maybe drawn to the right in Fig. 3 and torn off against this edge. The inspection slots 35 .permit the user to see howthe used and unused portions of the leaf are positioned with respect to the slot 33 and thus waste is avoided.

A transfer medium such as metallic leaf is of acomparatively delicate nature and likely to be accidentally broken. It therefore should be protected against undesired contact with the work. Furthermore, it

. shouldbe sharply and cleanly lifted away from the work in 'order to maintain the clear outlines of the transfer. These results are obtained in the present instance by firmly securing the leaf to the under side of the pressure plate 29, a suitable clamp being provided for this purpose and suitable means being provided for relaxing the pressure of the clampto permit the used leaf to be withdrawn-and new leaf to be inserted whether by drawing a further supply from a roll as in the illustrated example or by other means.

In the present embodiment of the invention the clamping of the transfer medium is provided for by means of a suitable yieldable angle plate having a base 67 underlying the base portion 29'of the pressure plate and similarly slotted and a flange 69 corresponding to the flange 31 and conveniently secured thereto by the screws 70 en tering through slots in the flange. In the normal position of the parts, whether with the plate 29 lowered or raised, the base 67 of the clamp firmly fits the base 29 of the plate and clamps the gold leaf or the like thereto. To relax this clamping pressure the base 67 of the angle may be sprung or bent, yielding from the flange 69 along one side of the slot 33. To facilitate this bendingthe base 67 may be'partly severed from flange 69 by a slot or slit 72 along the angle. The base 67 may be provided, as bestshown in Fig. 3, with extensions 7 71 projecting rearwardly 'of the base and providing operating portions whereby'the clamping plate may be sprung. i V

For springing the clamping plate I may provide suitable spring pressed rods 73 guided in the. uprights 23. and normally pressed upwardly by the springs '75. A suitable cross bar 77 provides a handle portion for depressing these rods against the springs. As shown in Fig. 4:, the rods may be provided. with recesses 79 adapted to receive the extended portions 71 .of the web 67 of the clamp, these recesses providing for a freedom of movement permitting the pressure plate 29 and the clamping clip 67 to be lifted to the raised position by the cam 53 without movement of the clamp as 7 long as the cross bar is not depressed. (See ig. 4:.) When the clamping apparatus as a whole is lifted by the, cam 53, if the cross bar 77 is depressed the upper ends of the recesses .79 will engage the exten sions 71 and bend-"flange 67 down to the position. shown in. Fig.5, thusrelaxing the clamping pressure thereof on" the pressure platev 29-and permitting the-gold leaf'or other transfermaterial which had been held between them to be withdrawn or to be pulled along. As shown in anexaggerated manner in Fig. Gthe parts'grippingthe gold leaf may be roughened at 81 as by drawing a file along the same to provide slight longitudinal ridges gins of the strip of leaf.

gripping the mar-' It will be understood that the construction described provides for a firm clamping of the gold leaf or the like which is held stationary against the pressure plate 29. When the work is completed and the parts brought to the position of Fig. 4 the leaf will be sharply lifted away from the article to be marked stripping it therefrom and insuring a clear definition of the marking which has been made without any possibility of smudging. At the same time the leaf is conveniently released. when desired, as shown by Fig. 5, to permit the used material to be withdrawn and new material to be placed in position.

Having thus described in detail the particular form of my invention shown by way of illustration in the accompanying drawings, the principles exemplified thereby which I claim as new and desire to secure by Letters Patent I shall express in the following claims.

Claims:

1. A device of the class described comprising a platen and an opposed apertured pressure plate shiftable relatively to the platen and having means for clamping a transfer medium adjacent the aperture therein.

2. A device of the class described comprising a platen and an opposed apertured pressure plate shiftable relatively to the platen and releasable clamping means carried by the plate for securing a transfer medium over the aperture therein.

3. A device of the class described comprising a platen and an opposed apertured pressure plate shiftable relatively to the platen, a spring plate secured along one side of the aperture and having provision permitting bending thereof when platen and pressure plate are separated whereby to release pressure on a transfer medium.

4. A device of the class described comprising a support providing a platen, an opposed, apertured pressure plate shiftable relatively to the platen, a clamping device secured at one side of the aperture, a manually operable device carried by said support having means engaging the clamping device on the oposite side of the aperture for bending the same away from the plate.

5. A device of the class described comprising a support providing a platen, an opposed, apertured pressure plate shiftable relatively to the platen, a clamping device secured at one side of the aperture, and a spring pressed rod slidable in said support having a handle for depressing the same, said rod arranged to engage said clamping device on the opposite side of the aperture for bending the same away from the plate.

6. A device of the class described comprising a support providing a platen, an opposed pressure plate, arms carrying said plate and guided for rectilinear movement on said support, springs cooperating with said arms for depressing the plate, a cam for elevating the plate, a spring clip for clamping a transfer medium to the plate and a member movable in said support for engaging the clip to rel-ease the pressure thereof.

7. A device of the class described comprising a support providing a platen, an op posed pressure plate, arms carrying said plate and guided for rectilinear movement on said support, springs cooperating with said arms for depressing the plate, a cam for elevating the plate, a spring clip for clamping a transfer medium to the plate, a spring pressed rod slidable in said support and arranged to interengage with the clip to depress the same.

8. A device of the class described comprising a support providing a platen, an opposed pressure plate, offset arms carrying the pressure plate and guided for substantially vertical movement on said support, springs acting on said arms to depress the plate, a bar connecting said arms and a cam for lifting the bar.

9. A pressure device of the class described comprising an angular member having a slotted base and an upstanding flange, a second angular member similarly slot-ted and having a flange secured to the flange of the first member and a base projecting past the margin of the base of the first member providing an operating portion for springing the second.

10. A device as described in claim 9 wherein the flanges are joined by a screw and slot connection.

11. A device as described in claim 9 wherein the said second angular member is weakened along the angle to facilitate bending of the base thereof.

In testimony whereof, I have signed my name to this specification.

WILLIAM E. GHOATE. 

